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. 1993 Jan;64(1):163–170. doi: 10.1016/S0006-3495(93)81351-1

Comparison between orientational and conformational orders in fluid lipid bilayers.

V R Kodati 1, M Lafleur 1
PMCID: PMC1262313  PMID: 8431540

Abstract

The orientational order as determined by 2H NMR and the infrared frequencies of the C--H stretching modes of the methylene groups have been measured for several systems (POPC, POPC/cholesterol and POPE), all in the fluid phase, and then were compared; this work reveals an unexpected linear correlation between them. This experimental result shows that both measurements are essentially sensitive to a common motion, most likely trans/gauche isomerisation. This new correlation with those already found in the literature suggest that several measurements related to the hydrophobic core of the fluid bilayer describe different aspects of a universal behavior. The correlation presented here does not extend to the lipid in gel phase where slower motions affect the NMR lineshape.

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Selected References

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